First use of the succinamate(−1) ligand in 3d-metal chemistry: dinuclear copper(II) complexes with the rare [Cu2(η1:μ2-O2CR)2(η1:η1:μ2-O2CR)]+, [Cu2(η1:η1:μ2-O2CR)2]2+ and [Cu2(μ-OH)(μ-OH2)(η1:η1:μ2-O2CR)]2+ cores, and a novel one-dimensional polymerization of two different dimers (R=CH2CH2CONH2)

Chadjistamatis, Iordanis; Terzis, Aris; Raptopoulou, Catherine P.; Perlepes, Spyros P.

doi:10.1016/j.inoche.2003.08.017

Cited by 45 publications

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“…Since the first copper(II) carboxylate dimer ie copper(II) acetate hydrate [Cu 2 (MeCO 2 ) 4 (H 2 O) 2 ] reported by van Niekerk and Schoening in 1953 [3], there have been reports of these kind of compounds. The dimeric copper (II) carboxylates [Cu 2 (RCOO) 4 L 2 ] are found to contain two or more antiferromagnetically coupled metal centres [4-7] and their magneto-structural correlation has been studied extensively [8]. Halogenated 2-thiophene carboxylic acids are used as building blocks for a new family of insecticides which also possess low mammalian toxicity [9].…”

Section: Introductionmentioning

confidence: 99%

Synthesis, characterization and X-ray structural studies of four copper (II) complexes containing dinuclear paddle wheel structures

Jenniefer

Muthiah

2013

Chemistry Central Journal

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BackgroundVarious dinuclear copper (II) complexes with octahedral geometry have been reported. The majority of these complexes contain N containing aromatic rings as axial ligands. There are also a few cases where the solvent used in the reaction occupies the axial position of the dinuclear copper (II) complex. This may occur by planned synthesis or some times by serendipity. Here we report some four copper (II) complexes containing solvent and or N containing heterocyclic ring as the axial ligand.ResultsFour compounds, each containing dinuclear Copper (II) units (with the most robust, frequently occurring paddle wheel structures) were synthesized and characterised by single crystal X-ray diffraction and by IR spectroscopy. The compounds 1 & 2 have the general formula Cu2(RCOO) 4(L)2 [(for (1) RCOO= 4-Chloro Benzoate, L= Isopropanol; for 2 RCOO= Benzoate, L= 2-Amino-4,6-dimethyl pyrimidine )] while 3 & 4 have the general formula, Cu2(RCOO) 4(S)2 Cu2(RCOO) 4(L)2 [RCOO=5-Chloro-thiophene-2-carboxylate L= 2-Amino-4,6-dimethyl pyrimidine, for 3 S= ethanol; for 4 S= methanol ]. A wide range of hydrogen bonds (of the O-H…O, N-H…O and N-H…N type) and π-π stacking interactions are present in the crystal structures.ConclusionsAll compounds contain the dinuclear units, in which two Cu (II) ions are bridged by four syn, syn-η1:η1:μ carboxylates, showing a paddle-wheel cage type with a distorted octahedral geometry. The compounds 1 &2 contain a single dimeric unit while 3 &4 contain two dimeric units. The structures 3 and 4 are very interesting co-crystals of two paddle wheel molecules. Also it is interesting to note that the compounds 3 &4 are isostructural with similar cell parameters. Both the compounds 3 &4 differ in the solvent molecule coordinated to copper in one of the dimeric units. In all the four compounds, each of the copper dimers has an inversion centre. Every copper has a distorted octahedral centre, formed by four oxygen atoms (from different carboxylate) in the equatorial sites. The two axial positions are occupied by copper and the corresponding ligand.

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Section: Introductionmentioning

confidence: 99%

Synthesis, characterization and X-ray structural studies of four copper (II) complexes containing dinuclear paddle wheel structures

Jenniefer

Muthiah

2013

Chemistry Central Journal

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“…A ligand blend reaction system consisting of succinamate OOC-CH 2 -CH 2 -CONH 2 and various aromatic N,N'-donors as mean of dinuclear and polymeric copper(II) compounds was reported by Chadjistamatis et al [8], where several reaction schemes were employed. The novel cationic coordination polymers obtained from their reactions consist of alternating [Cu 2 (Hsucm) 2 (dmpby) 2 ]…”

Section: Fig 1 X-ray Crystal Structure Showing Succinic Acid Used As ...mentioning

confidence: 99%

Succinicate Bridged Polymeric Complexes of Copper (II) and Zinc (II) Acetylacetonate

Mustapha¹

2014

ACSJ

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Cu(II) and Zn(II) salts were treated with 2,4-pentanedione to synthesize copper (II) acetylacetonate and zinc (II) acetylacetonate. These complexes were subsequently cross linked with succinate to produce corresponding bridged dimmers. The UV-visible spectrum of the complex showed absorption maximum at around 660nm, while the infrared spectra exhibited the absorption bands at 1419 cm -1 and 1429 cm -1 for the Cu(II) and Zn(II) complexes, respectively.

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Phenyl 2‐Pyridyl Ketone and Its Oxime in Manganese Carboxylate Chemistry: Synthesis, Characterisation, X‐ray Studies and Magnetic Properties of Mononuclear, Trinuclear and Octanuclear Complexes

et al. 2004

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The use of phenyl 2‐pyridyl ketone [(ph)(2‐py)CO] and its oxime [(ph)(2‐py)CNOH] in manganese benzoate chemistry has been investigated. The reaction of an excess of (ph)(2‐py)CNOH with Mn(O2CPh)2·2H2O affords the mononuclear complex [MnII(O2CPh)2{(ph)(2‐py)CNOH}2]·1.2H2O (1·1.2H2O) in high yield. The MnII ion is coordinated by two monodentate benzoates and two N,N′‐bidentate chelating (ph)(2‐py)CNOH molecules in a cis‐cis‐trans fashion. The comproportionation reaction between Mn(O2CPh)2·2H2O and NnBu4MnO4 (3:1) in the presence of (ph)(2‐py)CNOH in MeCN/EtOH/CH2Cl2 leads to the isolation of the mixed‐valent cluster [Mn8O2(OH)2(O2CPh)10{(ph)(2‐py)CNO}4]· 4CH2Cl2 (2·4CH2Cl2) in about 55% yield. A second synthetic procedure that leads to pure 2 involves the reaction between the known starting material (NnBu4)[Mn4IIIO2(O2CPh)9(H2O)] and four equivalents of the oxime ligand in CH2Cl2. The centrosymmetric octanuclear molecule contains four MnII and four MnIII ions held together by two μ4‐O2− ligands and two μ3‐OH− ions to give the unprecedented [Mn8(μ4‐O)2(μ3‐OH)2]14+ core, with peripheral ligation provided by ten PhCO2− (two η1, four syn,syn η1:η1:μ2 and four η1:η2:μ3) and four η1:η1:η1:μ2 (ph)(2‐py)CNO− ions. The 1:1 reaction between Mn(O2CPh)2·2H2O and the ketone (ph)(2‐py)CO affords the trinuclear complex [Mn3(O2CPh)6{(ph)(2‐py)CO}2] (3) in more than 80% yield. As judged from single‐crystal X‐ray crystallography, the complex adopts a linear structure with one η1:η2:μ2 and two η1:η1:μ2 benzoates spanning each pair of metal ions. The terminal MnII ions are capped by bidentate chelating (ph)(2‐py)CO ligands. The three complexes have been characterised by IR spectroscopy. The CV study of complex 2 in CH2Cl2 reveals irreversible reduction and oxidation processes. The magnetic properties of 2 and 3 have been studied by variable‐temperature dc magnetic‐susceptibility techniques. As the temperature approaches zero, the value of the χMT product for 2 approaches zero and, thus, the octanuclear complex has an S = 0 ground state. This S = 0 ground state is explained in terms of the magnetic behaviour of the central, butterfly‐like [Mn4III(μ3‐O)2]8+ subcore. The results for 3 reveal weak antiferromagnetic coupling, with J = −2.7 cm−1 for adjacent MnII ions. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2004)

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Cited by 45 publications

References 36 publications

Synthesis, characterization and X-ray structural studies of four copper (II) complexes containing dinuclear paddle wheel structures

Synthesis, characterization and X-ray structural studies of four copper (II) complexes containing dinuclear paddle wheel structures

Succinicate Bridged Polymeric Complexes of Copper (II) and Zinc (II) Acetylacetonate

Phenyl 2‐Pyridyl Ketone and Its Oxime in Manganese Carboxylate Chemistry: Synthesis, Characterisation, X‐ray Studies and Magnetic Properties of Mononuclear, Trinuclear and Octanuclear Complexes

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